参数资料
型号: LTC3522EUD#TRPBF
厂商: Linear Technology
文件页数: 3/20页
文件大小: 0K
描述: IC REG BUCK BOOST SYNC ADJ 16QFN
标准包装: 2,500
类型: 降压(降压),升压(升压)
输出类型: 可调式
输出数: 2
输出电压: 0.6 V ~ 5.5 V
输入电压: 2.4 V ~ 5.5 V
PWM 型: 电流模式,混合
频率 - 开关: 1.07MHz
电流 - 输出: 200mA,400mA
同步整流器:
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 16-WFQFN 裸露焊盘
包装: 带卷 (TR)
供应商设备封装: 16-QFN-EP(3x3)
LTC3522
ELECTRICAL CHARACTERISTICS The ● denotes the speci?cations which apply over the full operating
temperature range, otherwise speci?cations are at T A = 25°C. PV IN1 = PV IN2 = 3.6V, V OUT1 = 3.3V unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Maximum Duty Cycle
Minimum Duty Cycle
V FB2 = 0.54V
V FB2 = 0.66V
100
0
%
%
PGOOD Threshold
V FB2 Falling
–11.3
–7.7
–4.1
%
Power Good Hysteresis
Buck-Boost Converter
2.5
%
Output Voltage
PMOS Switch Resistance
NMOS Switch Resistance
2.2
0.29
0.22
5.25
V
Ω
Ω
NMOS Switch Leakage
PMOS Switch Leakage
V SW1A = V SW1B = 5V, PV IN1 = PV IN2 = 5V
V SW1A = V SW1B = 0V, PV IN1 = PV IN2 = 5V
0.1
0.1
5
10
μA
μA
Feedback Voltage
(Note 4)
0.97
1
1.03
V
Feedback Input Current
1
50
nA
Average Current Limit
(Note 3)
0.65
0.85
A
Burst Mode Current Limit
Reverse Current Limit
(Note 3)
230
340
250
mA
mA
Maximum Duty Cycle
Minimum Duty Cycle
V FB1 = 0.9V
V FB1 = 1.1V
70
80
0
%
%
PGOOD Threshold
V FB1 Falling
–12
–10
–8
%
Power Good Hysteresis
2.5
%
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC3522 is guaranteed to meet performance speci?cations
from 0°C to 85°C. Speci?cations over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
Note 4: The LTC3522 is tested in a proprietary non-switching test mode
that connects each FB pin to the output of the respective error ampli?er.
Note 5: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the speci?ed maximum operating junction
temperature may impair device reliability.
with statistical process controls.
Note 3: Current measurements are performed when the LTC3522 is not
switching. The current limit values in operation will be somewhat higher
due to the propagation delay of the comparators.
3522fa
3
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